Block-prbsser for paper-pulp mills



W. GURTYN. BLOCK PRESSER FOR PAPER, PULP MILLS. No. 342,072.

(No Model.)

WITNESSES INVHNTQR ATTORNEYS.

N. PETERS, Flwko-Lithcgnphur, Waflnglon, D. C)

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\VARREN CURTIS, OF CORINTH, NINV YORK.

BLOCKPREISSER FOR PAPER-PULP lVllLLS.

."fiPECIPICATION forming part of Letters Patent No. 342,072, dated May 18. 1886.

Application filed July 525, 1885.

T0 aZZ whom it may concern:

Be it known that I, \VARREN CURTIS, of Corinth, in the county of Saratoga and State of New York, have invented a new and Improved Block-Presser'for Paper-Yul p Mills, of which the following is a full, clear, and exact description.

The object of my invention is to provide a newandim proved blockresser for paper-pulp mills,which is so constructed as to show by means of the projecting piston-rod the position of the block, and to stop the feed automatically when the block is consumed,for the purpose of preventing injury to the plunger or piston and other parts of the machinery.

The invention consists in the construction and combination of parts and details, as will be fully set forth and described hereinafter.

Reference is to be had to the accompanying drawing, forming part of this specification, in which a longitudinal sectional elevation of the mechanism of my improved block-presser is shown.

The piston Aworks in the cylinder Hand is mounted on the piston-rod G, projecting from both ends of the piston and through. the upper end of the cylinder,which end of the cylinder has a stuffing-box, through which the rod passes. On the cylinder a chest, D, is secured, in which an ordinary valve, E, is fitted to slide, the said valve being connected to a rod, F, passed through a stuffing-box in one end of the chest.

The rod F is pivoted to a handle-lever, G, pivoted on one end of the cylinder, and having a part, H, projecting beyond the pivot and at the side of the piston-rod, and the part H is provided at its end with a recess or notch, J, in its upper edge for receiving a pin, K, pro- 40 jecting laterally from the piston-rod at the upper end.

Channels L and M lead from the chest D to the opposite ends of the cylinder, andbetween the inner ends of said channels an exhaustchannel, N, is formed. The presser-head or plunger 0 (shown in dotted lines) is secured on the lower end of the piston-rod.

The operation is as follows: NVhen the piston A is at the. upper or outer end of the cylinder, the piston-rod 0 projects from the said end of the cylinder and shows the relative Serial No.172,655. (No model.)

positions of the piston'rod, presser'head, or plunger. The lower end of the lever G is pressed by the hand of the operator in the direction of the arrow a, to bring the valve E into the position shown, so as to permit the water, steam, or compressed air to pass through the channel L into the upper or outer end of the cylinder and force the piston A. downward, whereby the block of wood is pressed against the guiding stone by the prcsser-head or plunger. As the block of wood is consumed,the piston or piston-rod and plunger move down, and by observing the projecting part of the rod the part of the block of wood consumed is made known. \Vhen the entire block has been consu1n ed,the piston-rod has been moved down to such an extent that the pin K strikes the upper end, H, of the lever G, the pin K passing into the notch J, and thereby the lever G is moved in the inverse direction of the arrow a, and the valve E is shifted to shut the water, steam, or compressed air off from either channel L or M, and the pistonrod and plunger are at astandstill. The plunger or presser-head is thus held close to the grindstone, which is prevented from. grinding off the pluuger,which it would do if thepiston A had not been stopped by shutting off the steam,watcr, or compressed air. The lever G is then moved by hand farther in the inverse direction of the arrow a, to shift the valve E in such a manner that the steam, water, or compressed air can pass through the channel M to the lower end of the cylinder and force the piston upward. When the piston is raised, the lever G- is moved in the direction of the arrow a to bring the valve E into the position shown, so as to permit the water, steam, or compressed air to pass through the channel L to the upper end of the cylinder and force down the piston, a fresh block of wood having been placed between the plunger and the stone.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, with a cylinder, of a piston in the same, a piston-rod on which the piston is mounted,the upper end of the pistonrod projecting through the upper end of the cylinder, and of a plunger or presser-head on the lower end of the piston-rod, substantially as herein shown and described.

r 2. The combination, with a cylinder, of a the piston-rod G, the piston A on the same piston in the same, a rod on which the piston within the cylinder, a plunger or resser-head is mounted, the said rod projecting through the on the lower end of the piston rod, the projecupper end of the cylinder, a plunger or pressertion K on the upper end of the rod 0, thelever I 5 5 head on the lower end of the piston-rod, a lat- G, havinga notch, J, and the valve E, coneral projection on the upper end of the rod, nected with the lever G, substantially as hereand a lever connected with a valve for reguin shown and describe lating the admission of steam, water, or com- WARREN CURTIS. pressed air into the cylinder, substantially as \Vitnesses: IO herein shown and described. A. L. PARMENTER,

3. The c0mbination,with the cylinder B, of R. P. BLOSS. 

